Attention: Psychologists define attention as a cognitive-behavioral process of maintaining the focus on a particular stimulus neglecting other perceivable stimuli. Division of the attention by the space and time: In my childhood I used to get fascinated seeing the magnifying glass burning a piece of paper when kept beneath the sun. One day I competed with my friend for burning a dot on the paper in shortest time. We made 2 dots on the paper close to each other, Point A and B. I selected point A and my friend selected point B. I was unable to keep hand holding the lens still. When my hand moved near or distant from the paper the area of the focus widened and point B also came into the focus. when my hand moved sideways the focus shifted between point A and point B. The heating of the point A was ineffective and I lost the bet. I slowly understood that, for the Point A to be burned effectively, point B should not share the space or time dedicated to heat point A. In ot...